From owner-freebsd-toolchain@freebsd.org Mon Mar 23 13:29:30 2020 Return-Path: Delivered-To: freebsd-toolchain@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 3692E26322E for ; Mon, 23 Mar 2020 13:29:30 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 48mFbZ0nKlz4JhG for ; Mon, 23 Mar 2020 13:29:30 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 17C07263229; Mon, 23 Mar 2020 13:29:30 +0000 (UTC) Delivered-To: toolchain@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 1776C263228 for ; Mon, 23 Mar 2020 13:29:30 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 48mFbY708Bz4Jh4 for ; Mon, 23 Mar 2020 13:29:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id E4016F21E for ; Mon, 23 Mar 2020 13:29:29 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 02NDTTHa001127 for ; Mon, 23 Mar 2020 13:29:29 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 02NDTTH9001126 for toolchain@FreeBSD.org; Mon, 23 Mar 2020 13:29:29 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: toolchain@FreeBSD.org Subject: [Bug 245006] toolchain: clang issues bogus "warning: multi-line // comment [-Wcomment]" Date: Mon, 23 Mar 2020 13:29:29 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: standards X-Bugzilla-Version: 12.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: mandree@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: standards@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform bug_file_loc op_sys bug_status bug_severity priority component assigned_to reporter cc Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-toolchain@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Maintenance of FreeBSD's integrated toolchain List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Mar 2020 13:29:30 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D245006 Bug ID: 245006 Summary: toolchain: clang issues bogus "warning: multi-line // comment [-Wcomment]" Product: Base System Version: 12.1-RELEASE Hardware: Any URL: https://github.com/Genivia/RE-flex/issues/68 OS: Any Status: New Severity: Affects Some People Priority: --- Component: standards Assignee: standards@FreeBSD.org Reporter: mandree@FreeBSD.org CC: toolchain@FreeBSD.org Greetings, debugging a ports/textproc/re-flex 1.6.4 issue, I came across a standards violation in clang, observed in base clang 8.0.1 (FreeBSD 12.1 amd64), ports clang 9 and clang-devel as of today (llvm90-9.0.1 llvm-devel-11.0.d20200117= ), but not gcc-9.2.0 from ports. Save these two lines as try.c: // \ x void f(void) {} Then observe: $ gcc -pedantic-errors -std=3Dc11 -c /tmp/try.c=20 (no output) $ /usr/bin/clang -pedantic-errors -std=3Dc11 -c /tmp/try.c=20 /tmp/try.c:1:4: error: multi-line // comment [-Werror,-Wcomment] // \ ^ 1 error generated. Reading up in C99, C11, C++11, it is clear that line merging happens in compilation phase 2, before phase 3 elides comments and replaces them by one space. --=20 You are receiving this mail because: You are on the CC list for the bug.=